<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>1_非受控组件</title>
</head>
<body>
    	<!-- 准备好一个“容器” -->
	<div id="test"></div>
	
	<!-- 引入react核心库 -->
	<script type="text/javascript" src="../js/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作DOM -->
	<script type="text/javascript" src="../js/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script type="text/javascript" src="../js/babel.min.js"></script>

    <script type="text/babel">
        // 创建组件
        class Login extends React.Component{
            handleSubmit = (event) => {
                event.preventDefault(); // 阻止表单提交
                const {username,password}=this
                alert(`我的用户名是${username.value},我的密码是${password.value}`)
            }
            render(){
                return (
                   <form onSubmit={this.handleSubmit}>
                      用户名: <input ref={(currentNode)=>{this.username=currentNode}} type="text"  name="username"/>
                        <br/>
                        密&nbsp;&nbsp;&nbsp;码: <input ref={(currentNode)=>{this.password=currentNode}} type="password"  name="password"/>
                        <br/>
                        <button>登录</button>
                    </form>
                )
            }
        }
        //渲染组件
        ReactDOM.render(<Login />,document.getElementById('test'))
    </script>
</body>
</html>